Guild

Guild is an AI-native defense contractor that transforms government requirements into manufactured aerospace parts, handling everything from planning through delivery. The company leverages artificial intelligence to automate the conversion of technical specifications into production plans, coordinate qualified factories, manage compliance, and ensure timely delivery of critical defense hardware. Backed by Y Combinator, Guild aims to reduce waste, accelerate production cycles, and provide transparent, traceable manufacturing for defense contracts.

Guild publishes 1 API contract indexed on the APIs.io network: Opportunity Feed API. Tagged areas include Company, AI, Defense, Manufacturing, and Aerospace.

The Guild catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Guild’s developer surface includes authentication, documentation, API reference, getting-started guide, support, signup flow, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.3/100 developing Agent 37/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 published contracts 1 Agent Skills

CompanyAIDefense Manufacturing AerospaceStartup

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 40.3/100 · developing

Contract Quality 12.5 / 21

Developer Ergonomics 10.4 / 17

Access Clarity 2.2 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 13.2 — up to +17.4 composite points
Operational Transparency scores 0.0 — up to +13.0 composite points
Contract Quality scores 59.0 — up to +10.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/guildai-co/apis.yml: open an issue on github.com/api-evangelist/guildai-co to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Guild Opportunity Feed API

The Opportunity Feed API from Guild — 1 operation(s) for opportunity feed.

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

public-opportunity-feed

AGENT SKILL

Rate Limits 1

Documented rate limits and quota policies.

Guildai Co Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Guildai Co Context

3 classes · 17 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Guild API Rules

16 rules · 14 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Guildai Co Openapi Overlay

1 action · update · guildai-co-openapi.yaml

DERIVED

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

OpportunityFeedResponse

3 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Guildai Co Authentication

1 scheme

SECURITY

Guildai Co Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Guildai Co Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Guildai Co Agentic Access

2 operations

2 operations · 0 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: guildai-co
name: Guild
description: Guild is an AI-native defense contractor that transforms government requirements into manufactured aerospace
  parts, handling everything from planning through delivery. The company leverages artificial intelligence to automate the
  conversion of technical specifications into production plans, coordinate qualified factories, manage compliance, and ensure
  timely delivery of critical defense hardware. Backed by Y Combinator, Guild aims to reduce waste, accelerate production
  cycles, and provide transparent, traceable manufacturing for defense contracts.
url: https://artifacts.apis.io/guildai-co/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Company
- AI
- Defense
- Manufacturing
- Aerospace
- Startup
image: https://www.guildai.co/hero/guild-galaxy-spline-poster.jpg
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/guildai-co-agentic-access.yml
- type: Spectral
  url: rules/guildai-co-rules.yml
- type: JSONLD
  url: json-ld/guildai-co-context.jsonld
- type: Vocabulary
  url: vocabulary/guildai-co-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/guildai-co-data-model.yml
- type: Authentication
  url: authentication/guildai-co-authentication.yml
- type: ErrorCatalog
  url: errors/guildai-co-problem-types.yml
- type: Conformance
  url: conformance/guildai-co-conformance.yml
- type: Overlay
  url: overlays/guildai-co-openapi-overlay.yaml
- type: Hosts
  url: hosts/guildai-co-hosts.yml
- type: Vendors
  url: vendors/guildai-co-vendors.yml
- type: DomainSecurity
  url: security/guildai-co-domain-security.yml
- type: Website
  url: https://www.guildai.co
- type: Documentation
  url: https://docs.guildai.co
- type: APIReference
  url: https://docs.guildai.co/openapi.yaml
- type: GettingStarted
  url: https://www.guildai.co/platform/
- type: Support
  url: mailto:info@guildai.co
- type: DeveloperPortal
  url: https://app.guildai.co/auth
- type: SignUp
  url: https://app.guildai.co/auth
apis:
- aid: guildai-co:guildai-co-opportunity-feed-api
  name: Guild Opportunity Feed API
  description: The Opportunity Feed API from Guild — 1 operation(s) for opportunity feed.
  humanURL: https://docs.guildai.co
  baseURL: https://app.guildai.co
  tags:
  - Opportunity Feed
  properties:
  - type: OpenAPI
    url: openapi/guildai-co-opportunity-feed-api-openapi.yml
  - type: Documentation
    url: https://docs.guildai.co
  - type: APIReference
    url: https://docs.guildai.co/openapi.yaml
  - type: JSONSchema
    url: json-schema/guildai-co-opportunity-feed-response-schema.json
x-backed-by:
- y-combinator
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 30
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Guild API — frequently asked questions

Does Guild have an API?

Yes. APIs.io lists 1 API from Guild, including Guild Opportunity Feed API.

Is there an OpenAPI specification for the Guild API?

Yes. APIs.io indexes 1 OpenAPI specification for Guild, each linked for download from this page.

How do I authenticate with the Guild API?

Guild uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Guildai Co Authentication.

Is the Guild API ready for AI agents?

Guild has a Kin Score of 40.3 out of 100 (developing) and an Agent Readiness score of 36.7 (agent-ready), scored by API Evangelist on 2026-10-31.

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